Investment Securities - Investments in Continuous Loss Position (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities
Less Than 12 Months, Fair value	$ 64,766	$ 86,977
Less Than 12 Months, Unrealized losses	826	579
12 Months or More, Fair value	7,864	22,818
12 Months or More, Unrealized losses	169	543
Total, Fair value	72,630	109,795
Total, Unrealized losses	995	1,122
Securities of U.S. government agencies
Schedule of Available-for-sale Securities
Less Than 12 Months, Fair value	2,429
Less Than 12 Months, Unrealized losses	1
12 Months or More, Fair value	0
12 Months or More, Unrealized losses	0
Total, Fair value	2,429
Total, Unrealized losses	1
Government sponsored agencies - Residential mortgage-backed securities
Schedule of Available-for-sale Securities
Continuous unrealized loss investments, number of positions		3
Less Than 12 Months, Fair value	12,021	13,121
Less Than 12 Months, Unrealized losses	325	45
12 Months or More, Fair value	0	16,751
12 Months or More, Unrealized losses	0	348
Total, Fair value	12,021	29,872
Total, Unrealized losses	325	393
Government sponsored agencies - Collateralized mortgage obligations
Schedule of Available-for-sale Securities
Continuous unrealized loss investments, number of positions	3	2
Less Than 12 Months, Fair value	27,417	70,421
Less Than 12 Months, Unrealized losses	127	505
12 Months or More, Fair value	7,626	5,043
12 Months or More, Unrealized losses	168	87
Total, Fair value	35,043	75,464
Total, Unrealized losses	295	592
Private label collateralized mortgage obligations
Schedule of Available-for-sale Securities
Continuous unrealized loss investments, number of positions	1	1
Less Than 12 Months, Fair value	0	0
Less Than 12 Months, Unrealized losses	0	0
12 Months or More, Fair value	178	971
12 Months or More, Unrealized losses	0	57
Total, Fair value	178	971
Total, Unrealized losses	0	57
State and municipal securities
Schedule of Available-for-sale Securities
Less Than 12 Months, Fair value	22,899	3,429
Less Than 12 Months, Unrealized losses	373	28
12 Months or More, Fair value	0	0
12 Months or More, Unrealized losses	0	0
Total, Fair value	22,899	3,429
Total, Unrealized losses	373	28
Common and preferred stocks
Schedule of Available-for-sale Securities
Continuous unrealized loss investments, number of positions	2	1
Less Than 12 Months, Fair value	0	6
Less Than 12 Months, Unrealized losses	0	1
12 Months or More, Fair value	60	53
12 Months or More, Unrealized losses	1	51
Total, Fair value	60	59
Total, Unrealized losses	$ 1	$ 52